CONRAD JOHNSON ART Mono Blocs, Superb Condition, Superb Sound - WARRANTY!

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Conrad Johnson Art Monobloc Amplifiers, customer Trade, not sure of age but Serial Numbers 23-24, rated 9/10 with one tiny nick on faceplate of one amp. Brand new KT120 tubes in October, 2014, not used 4 hours since! Both amps were at CJ in March, 2014 (one had broken binding post) and fully checked out by CJ. Includes all factory packing and manual. One year warranty (except on tubes).
 Note to International Customers: Amps are configured for 110-120V and it is not known what would be involved in converting to 220-240V

Testimonials

"The GAT and the ART are (by a considerable margin) the highest-resolution, lowest noise, most transparent-to-sources c-j electronics I've ever auditioned—fully competitive with the best preamps and amps I've heard from ARC... I can confidently recommend the ART and GAT to high-end aficionados with enough moolah to buy them. These are undoubtedly reference-quality components—the best (by far) that conrad-johnson has made."
- Jonathan Valin, The Absolute Sound (read the review)

"this could be the last product you buy, not only in a round of upgrades, but also in terms of it being the sort of amplifier you could comfortably live with for decades... It joins a range that points to that harmonically beguiling place the best of all c-j amps always took you, but without any of the lushness or softened leading edges the amps could descend into. Calling this amp the Premier 8a of the 21st Century is a massive compliment, but the ARTsa is so much more than that. This must be heard, as it joins the GAT as one of the world's best."
- Alan Sircom, HiFi+ ,on the ARTsa, (read the review)

ART Amplifier - stock photo

Overview

The limited edition Conrad Johnson ART Amplifier is designed to be a reference amplifier for the use of industry professionals as well as dedicated audiophiles. Like its companion GAT Preamplifier, the ART Amplifier will be offered in an edition of just 250 units (125 pairs) to be sold through selected conrad-johnson dealers and distributors. Those who do not need the prodigious 275 watt power delivered by the mighty ART mono-blocks will want to consider the ARTsa Stereo Amplifier. Nearly identical cosmetically (one more tube in the front), it is exactly an ART amplifier divided into two channels, each producing a solid 140 watts.

At conrad-johnson, their approach to circuit design is predicated on the principle that the surest path to both state-of-the-art musicality and exceptional reliability is simple circuits constructed of the finest available parts. These ART amplifiers exemplify this basic principle. The audio circuit has just three elements, each as simple as possible, and each essential to the operation of the amplifier. A voltage gain amplifier (a single triode) is direct-coupled to a cathode coupled phase inverter (each phase handled by a single triode), which in turn drives the output stage. For the ART mono-blocks, four pairs of KT120 output tubes, chosen for their musical accuracy, high power, and reliability, endow this amplifier with a muscular 275 watt output rating. For the ARTsa, two pairs of KT120 output tubes in each channel produce 140 watts of power per channel. A small amount (about 12 dB) of loop negative feedback reduces distortion and achieves a sufficiently high damping factor to control the reactive load typically presented by high-performance loudspeaker systems. To assure continued peak performance, the owner need only make a simple bias adjustment when new tubes are installed. Built in LED bias indicators allow the user to make this adjustment using only the supplied screwdriver.

Separate, low impedance, discrete dc power supply regulators are provided for the input and phase-inverter stages, thoroughly isolating these stages from the power demands of the output stage. These power supplies are designed to maintain a rock solid supply at all audio frequencies.

Component parts contribute importantly to the sonic performance of any circuit design. The ART amplifiers maintain the exacting quality standards for which conrad-johnson is internationally known. Resistors are precision laser-trimmed metal foil types. Coupling capacitors are the new Teflon CJD caps, while the power supplies use large value polypropylene capacitors in parallel with CJD Teflons. There are no electrolytic capacitors in the audio circuits or in the related power supplies. Proprietary wide-bandwidth output transformers contribute to excellent high frequency performance. Even the machined gold plated OFC connectors and the internal wiring have been carefully selected for optimal sonic performance. Attention to every detail enable us to extract the full potential from our circuit designs and ensures that our products will perform to this potential for years to come. The ART and ARTsa amplifiers are built without compromise to achieve a new standard in musical performance, and they are built to last.

Specifications

Power: 275 watts from 30 Hz to 15 KHz at no more than .5 % THD or IMD into 4 ohms (also available connected for 8 or 16 ohm loads)
Frequency Response (at 10 watts): 20 Hz to 20 kHz, +/- .25 dB
Hum and Noise: 108 dB below rated power
Input Impedance: 100 kOhms
Tube Complement: 1 x M8080, 1 x 6N30P, 8 x KT120
Dimensions: 18.75D x 19W x 7.13H inches
Weight: ART - 83 Lbs. ARTsa – 82 Lbs.

California sales subject to sales tax.

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GET A FASTER RESPONSE! It's easier if you email directly to jay "at" audiorevelation.com rather than thru the Audiogon system. We are a VERIFIED AUDIOGON DEALER and pay a fixed monthly fee and therefore no commissions on sales. Thanks in advance!